The official documentation for installing packages is here:
(Since March 2015, there is an official repo for the Atom.io doc)
You can also install packages from the command line using apm.
Check that you have apm installed by running the following command in your terminal:
apm help install
You should see a message print out with details about the apm install command.
If you do not, launch Atom and run the Atom > Install Shell Commands menu to install the apm and atom commands.
You can also install packages by using the apm install command:
apm install <package_name> to install the latest version.
apm install <package_name>@<package_version> to install a specific version.
For example apm install [email protected] installs the 0.1.5 release of the Emmet package into ~/.atom/packages.
You can also use apm to find new packages to install:
apm search coffee to search for CoffeeScript packages.
apm view emmet to see more information about a specific package.
Regarding the manual installation of a package in Atom, this thread mentions
You can download the package, unzip or decompress, go to that folder and run: apm link that will create a symbolic link from that package to your ~/.atom/packages folder
The repo can be found via the "Learn More"-button in the package manager.
In your case:
You find a similar process in this thread:
- Make sure I do not have module installed already.
git clone https://github.com/AtomLinter/linter-phpcs to ~/Projects/
apm link --dev while being inside of ~/Projects/linter-phpcs.
It successfully created symlink in ~/.atom/dev/packages/linter-phpcs
- Open atom using "atom --dev" command while being in
~/.atom/dev/packages/linter-phpcs